sfas.c revision 1.16.84.1
1 /* $NetBSD: sfas.c,v 1.16.84.1 2009/05/13 17:16:03 jym Exp $ */ 2 3 /* 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Van Jacobson of Lawrence Berkeley Laboratory. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)scsi.c 7.5 (Berkeley) 5/4/91 35 */ 36 37 /* 38 * Copyright (c) 1995 Scott Stevens 39 * Copyright (c) 1995 Daniel Widenfalk 40 * Copyright (c) 1994 Christian E. Hopps 41 * 42 * This code is derived from software contributed to Berkeley by 43 * Van Jacobson of Lawrence Berkeley Laboratory. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by the University of 56 * California, Berkeley and its contributors. 57 * 4. Neither the name of the University nor the names of its contributors 58 * may be used to endorse or promote products derived from this software 59 * without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 65 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71 * SUCH DAMAGE. 72 * 73 * @(#)scsi.c 7.5 (Berkeley) 5/4/91 74 */ 75 76 /* 77 * Emulex FAS216 scsi adaptor driver 78 */ 79 80 /* 81 * Modified for NetBSD/arm32 by Scott Stevens 82 */ 83 84 #include <sys/cdefs.h> 85 __KERNEL_RCSID(0, "$NetBSD: sfas.c,v 1.16.84.1 2009/05/13 17:16:03 jym Exp $"); 86 87 #include <sys/param.h> 88 #include <sys/systm.h> 89 #include <sys/device.h> 90 #include <sys/buf.h> 91 #include <sys/proc.h> 92 93 #include <dev/scsipi/scsi_all.h> 94 #include <dev/scsipi/scsipi_all.h> 95 #include <dev/scsipi/scsiconf.h> 96 97 #include <uvm/uvm_extern.h> 98 99 #include <machine/pmap.h> 100 #include <machine/cpu.h> 101 #include <machine/io.h> 102 #include <machine/intr.h> 103 #include <arm/arm32/katelib.h> 104 #include <acorn32/podulebus/podulebus.h> 105 #include <acorn32/podulebus/sfasreg.h> 106 #include <acorn32/podulebus/sfasvar.h> 107 108 void sfas_minphys(struct buf *); 109 void sfas_init_nexus(struct sfas_softc *, struct nexus *); 110 void sfasinitialize(struct sfas_softc *); 111 void sfas_scsi_request(struct scsipi_channel *, scsipi_adapter_req_t, void *); 112 void sfas_donextcmd(struct sfas_softc *, struct sfas_pending *); 113 void sfas_scsidone(struct sfas_softc *, struct scsipi_xfer *, int); 114 void sfasintr(struct sfas_softc *); 115 void sfasiwait(struct sfas_softc *); 116 void sfas_ixfer(void *, int); 117 void sfasreset(struct sfas_softc *, int); 118 int sfasselect(struct sfas_softc *, struct sfas_pending *, unsigned char *, 119 int, unsigned char *, int, int); 120 void sfasicmd(struct sfas_softc *, struct sfas_pending *); 121 void sfasgo(struct sfas_softc *, struct sfas_pending *); 122 void sfas_save_pointers(struct sfas_softc *); 123 void sfas_restore_pointers(struct sfas_softc *); 124 void sfas_build_sdtrm(struct sfas_softc *, int, int); 125 int sfas_select_unit(struct sfas_softc *, short); 126 struct nexus *sfas_arbitate_target(struct sfas_softc *, int); 127 void sfas_setup_nexus(struct sfas_softc *, struct nexus *, 128 struct sfas_pending *, unsigned char *, int, 129 unsigned char *, int, int); 130 int sfas_pretests(struct sfas_softc *, sfas_regmap_p); 131 int sfas_midaction(struct sfas_softc *, sfas_regmap_p, struct nexus *); 132 int sfas_postaction(struct sfas_softc *, sfas_regmap_p, struct nexus *); 133 134 /* 135 * Initialize these to make 'em patchable. Defaults to enable sync and discon. 136 */ 137 u_char sfas_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; 138 u_char sfas_inhibit_disc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; 139 140 #define DEBUG 141 #ifdef DEBUG 142 #define QPRINTF(a) if (sfas_debug > 1) printf a 143 int sfas_debug = 2; 144 #else 145 #define QPRINTF 146 #endif 147 148 /* 149 * default minphys routine for sfas based controllers 150 */ 151 void 152 sfas_minphys(struct buf *bp) 153 { 154 155 /* 156 * No max transfer at this level. 157 */ 158 minphys(bp); 159 } 160 161 /* 162 * Initialize the nexus structs. 163 */ 164 void 165 sfas_init_nexus(struct sfas_softc *dev, struct nexus *nexus) 166 { 167 memset(nexus, 0, sizeof(struct nexus)); 168 169 nexus->state = SFAS_NS_IDLE; 170 nexus->period = 200; 171 nexus->offset = 0; 172 nexus->syncper = 5; 173 nexus->syncoff = 0; 174 nexus->config3 = dev->sc_config3 & ~SFAS_CFG3_FASTSCSI; 175 } 176 177 void 178 sfasinitialize(struct sfas_softc *dev) 179 { 180 u_int *pte; 181 int i; 182 183 dev->sc_led_status = 0; 184 185 TAILQ_INIT(&dev->sc_xs_pending); 186 TAILQ_INIT(&dev->sc_xs_free); 187 188 /* 189 * Initialize the sfas_pending structs and link them into the free list. We 190 * have to set vm_link_data.pages to 0 or the vm FIX won't work. 191 */ 192 for(i=0; i<MAXPENDING; i++) { 193 TAILQ_INSERT_TAIL(&dev->sc_xs_free, &dev->sc_xs_store[i], 194 link); 195 } 196 197 /* 198 * Calculate the correct clock conversion factor 2 <= factor <= 8, i.e. set 199 * the factor to clock_freq / 5 (int). 200 */ 201 if (dev->sc_clock_freq <= 10) 202 dev->sc_clock_conv_fact = 2; 203 if (dev->sc_clock_freq <= 40) 204 dev->sc_clock_conv_fact = 2+((dev->sc_clock_freq-10)/5); 205 else 206 panic("sfasinitialize: Clock frequence too high"); 207 208 /* Setup and save the basic configuration registers */ 209 dev->sc_config1 = (dev->sc_host_id & SFAS_CFG1_BUS_ID_MASK); 210 dev->sc_config2 = SFAS_CFG2_FEATURES_ENABLE; 211 dev->sc_config3 = (dev->sc_clock_freq > 25 ? SFAS_CFG3_FASTCLK : 0); 212 213 /* Precalculate timeout value and clock period. */ 214 /* Ekkk ... floating point in the kernel !!!! */ 215 /* dev->sc_timeout_val = 1+dev->sc_timeout*dev->sc_clock_freq/ 216 (7.682*dev->sc_clock_conv_fact);*/ 217 dev->sc_timeout_val = 1+dev->sc_timeout*dev->sc_clock_freq/ 218 ((7682*dev->sc_clock_conv_fact)/1000); 219 dev->sc_clock_period = 1000/dev->sc_clock_freq; 220 221 sfasreset(dev, 1 | 2); /* Reset Chip and Bus */ 222 223 dev->sc_units_disconnected = 0; 224 dev->sc_msg_in_len = 0; 225 dev->sc_msg_out_len = 0; 226 227 dev->sc_flags = 0; 228 229 for(i=0; i<8; i++) 230 sfas_init_nexus(dev, &dev->sc_nexus[i]); 231 232 if (dev->sc_ixfer == NULL) 233 dev->sc_ixfer = sfas_ixfer; 234 235 /* 236 * Setup bump buffer. 237 */ 238 dev->sc_bump_va = (u_char *)uvm_km_alloc(kernel_map, dev->sc_bump_sz, 0, 239 UVM_KMF_WIRED | UVM_KMF_ZERO); 240 (void) pmap_extract(pmap_kernel(), (vaddr_t)dev->sc_bump_va, 241 (paddr_t *)&dev->sc_bump_pa); 242 243 /* 244 * Setup pages to noncachable, that way we don't have to flush the cache 245 * every time we need "bumped" transfer. 246 */ 247 pte = vtopte((vaddr_t) dev->sc_bump_va); 248 *pte &= ~(L2_C | L2_B); 249 PTE_SYNC(pte); 250 cpu_tlb_flushD(); 251 cpu_dcache_wbinv_range((vm_offset_t)dev->sc_bump_va, PAGE_SIZE); 252 253 printf(" dmabuf V0x%08x P0x%08x", (u_int)dev->sc_bump_va, (u_int)dev->sc_bump_pa); 254 } 255 256 257 /* 258 * used by specific sfas controller 259 */ 260 void 261 sfas_scsi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 262 void *arg) 263 { 264 struct scsipi_xfer *xs; 265 struct sfas_softc *dev = (void *)chan->chan_adapter->adapt_dev; 266 struct scsipi_periph *periph; 267 struct sfas_pending *pendp; 268 int flags, s, target; 269 270 switch (req) { 271 case ADAPTER_REQ_RUN_XFER: 272 xs = arg; 273 periph = xs->xs_periph; 274 flags = xs->xs_control; 275 target = periph->periph_target; 276 277 if (flags & XS_CTL_DATA_UIO) 278 panic("sfas: scsi data uio requested"); 279 280 if ((flags & XS_CTL_POLL) && (dev->sc_flags & SFAS_ACTIVE)) 281 panic("sfas_scsicmd: busy"); 282 283 /* Get hold of a sfas_pending block. */ 284 s = splbio(); 285 pendp = dev->sc_xs_free.tqh_first; 286 if (pendp == NULL) { 287 xs->error = XS_RESOURCE_SHORTAGE; 288 scsipi_done(xs); 289 splx(s); 290 return; 291 } 292 TAILQ_REMOVE(&dev->sc_xs_free, pendp, link); 293 pendp->xs = xs; 294 splx(s); 295 296 297 /* If the chip if busy OR the unit is busy, we have to wait for out turn. */ 298 if ((dev->sc_flags & SFAS_ACTIVE) || 299 (dev->sc_nexus[target].flags & SFAS_NF_UNIT_BUSY)) { 300 s = splbio(); 301 TAILQ_INSERT_TAIL(&dev->sc_xs_pending, pendp, link); 302 splx(s); 303 } else 304 sfas_donextcmd(dev, pendp); 305 306 return; 307 308 case ADAPTER_REQ_GROW_RESOURCES: 309 case ADAPTER_REQ_SET_XFER_MODE: 310 /* XXX Not supported. */ 311 return; 312 } 313 } 314 315 /* 316 * Actually select the unit, whereby the whole scsi-process is started. 317 */ 318 void 319 sfas_donextcmd(struct sfas_softc *dev, struct sfas_pending *pendp) 320 { 321 int s; 322 323 /* 324 * Special case for scsi unit reset. I think this is waterproof. We first 325 * select the unit during splbio. We then cycle through the generated 326 * interrupts until the interrupt routine signals that the unit has 327 * acknowledged the reset. After that we have to wait a reset to select 328 * delay before anything else can happend. 329 */ 330 if (pendp->xs->xs_control & XS_CTL_RESET) { 331 struct nexus *nexus; 332 333 s = splbio(); 334 while(!sfasselect(dev, pendp, 0, 0, 0, 0, SFAS_SELECT_K)) { 335 splx(s); 336 delay(10); 337 s = splbio(); 338 } 339 340 nexus = dev->sc_cur_nexus; 341 while(nexus->flags & SFAS_NF_UNIT_BUSY) { 342 sfasiwait(dev); 343 sfasintr(dev); 344 } 345 346 nexus->flags |= SFAS_NF_UNIT_BUSY; 347 splx(s); 348 349 sfasreset(dev, 0); 350 351 s = splbio(); 352 nexus->flags &= ~SFAS_NF_UNIT_BUSY; 353 splx(s); 354 } 355 356 /* 357 * If we are polling, go to splbio and perform the command, else we poke 358 * the scsi-bus via sfasgo to get the interrupt machine going. 359 */ 360 if (pendp->xs->xs_control & XS_CTL_POLL) { 361 s = splbio(); 362 sfasicmd(dev, pendp); 363 TAILQ_INSERT_TAIL(&dev->sc_xs_free, pendp, link); 364 splx(s); 365 } else { 366 sfasgo(dev, pendp); 367 } 368 } 369 370 void 371 sfas_scsidone(struct sfas_softc *dev, struct scsipi_xfer *xs, int stat) 372 { 373 struct sfas_pending *pendp; 374 int s; 375 376 xs->status = stat; 377 378 if (stat == 0) 379 xs->resid = 0; 380 else { 381 switch(stat) { 382 case SCSI_CHECK: 383 case SCSI_BUSY: 384 xs->error = XS_BUSY; 385 break; 386 case -1: 387 xs->error = XS_DRIVER_STUFFUP; 388 QPRINTF(("sfas_scsicmd() bad %x\n", stat)); 389 break; 390 default: 391 xs->error = XS_TIMEOUT; 392 break; 393 } 394 } 395 396 /* Steal the next command from the queue so that one unit can't hog the bus. */ 397 s = splbio(); 398 pendp = dev->sc_xs_pending.tqh_first; 399 while(pendp) { 400 if (!(dev->sc_nexus[pendp->xs->xs_periph->periph_target].flags & 401 SFAS_NF_UNIT_BUSY)) 402 break; 403 pendp = pendp->link.tqe_next; 404 } 405 406 if (pendp != NULL) { 407 TAILQ_REMOVE(&dev->sc_xs_pending, pendp, link); 408 } 409 410 splx(s); 411 scsipi_done(xs); 412 413 if (pendp) 414 sfas_donextcmd(dev, pendp); 415 } 416 417 /* 418 * There are two kinds of reset: 419 * 1) CHIP-bus reset. This also implies a SCSI-bus reset. 420 * 2) SCSI-bus reset. 421 * After the appropriate resets have been performed we wait a reset to select 422 * delay time. 423 */ 424 void 425 sfasreset(struct sfas_softc *dev, int how) 426 { 427 sfas_regmap_p rp; 428 int i, s; 429 430 rp = dev->sc_fas; 431 432 if (how & 1) { 433 for(i=0; i<8; i++) 434 sfas_init_nexus(dev, &dev->sc_nexus[i]); 435 436 *rp->sfas_command = SFAS_CMD_RESET_CHIP; 437 delay(1); 438 *rp->sfas_command = SFAS_CMD_NOP; 439 440 *rp->sfas_config1 = dev->sc_config1; 441 *rp->sfas_config2 = dev->sc_config2; 442 *rp->sfas_config3 = dev->sc_config3; 443 *rp->sfas_timeout = dev->sc_timeout_val; 444 *rp->sfas_clkconv = dev->sc_clock_conv_fact & 445 SFAS_CLOCK_CONVERSION_MASK; 446 } 447 448 if (how & 2) { 449 for(i=0; i<8; i++) 450 sfas_init_nexus(dev, &dev->sc_nexus[i]); 451 452 s = splbio(); 453 454 *rp->sfas_command = SFAS_CMD_RESET_SCSI_BUS; 455 delay(100); 456 457 /* Skip interrupt generated by RESET_SCSI_BUS */ 458 while(*rp->sfas_status & SFAS_STAT_INTERRUPT_PENDING) { 459 dev->sc_status = *rp->sfas_status; 460 dev->sc_interrupt = *rp->sfas_interrupt; 461 462 delay(100); 463 } 464 465 dev->sc_status = *rp->sfas_status; 466 dev->sc_interrupt = *rp->sfas_interrupt; 467 468 splx(s); 469 } 470 471 if (dev->sc_config_flags & SFAS_SLOW_START) 472 delay(4*250000); /* RESET to SELECT DELAY*4 for slow devices */ 473 else 474 delay(250000); /* RESET to SELECT DELAY */ 475 } 476 477 /* 478 * Save active data pointers to the nexus block currently active. 479 */ 480 void 481 sfas_save_pointers(struct sfas_softc *dev) 482 { 483 struct nexus *nx; 484 485 nx = dev->sc_cur_nexus; 486 if (nx) { 487 nx->cur_link = dev->sc_cur_link; 488 nx->max_link = dev->sc_max_link; 489 nx->buf = dev->sc_buf; 490 nx->len = dev->sc_len; 491 nx->dma_len = dev->sc_dma_len; 492 nx->dma_buf = dev->sc_dma_buf; 493 nx->dma_blk_flg = dev->sc_dma_blk_flg; 494 nx->dma_blk_len = dev->sc_dma_blk_len; 495 nx->dma_blk_ptr = dev->sc_dma_blk_ptr; 496 } 497 } 498 499 /* 500 * Restore data pointers from the currently active nexus block. 501 */ 502 void 503 sfas_restore_pointers(struct sfas_softc *dev) 504 { 505 struct nexus *nx; 506 507 nx = dev->sc_cur_nexus; 508 if (nx) { 509 dev->sc_cur_link = nx->cur_link; 510 dev->sc_max_link = nx->max_link; 511 dev->sc_buf = nx->buf; 512 dev->sc_len = nx->len; 513 dev->sc_dma_len = nx->dma_len; 514 dev->sc_dma_buf = nx->dma_buf; 515 dev->sc_dma_blk_flg = nx->dma_blk_flg; 516 dev->sc_dma_blk_len = nx->dma_blk_len; 517 dev->sc_dma_blk_ptr = nx->dma_blk_ptr; 518 dev->sc_chain = nx->dma; 519 dev->sc_unit = (nx->lun_unit & 0x0F); 520 dev->sc_lun = (nx->lun_unit & 0xF0) >> 4; 521 } 522 } 523 524 /* 525 * sfasiwait is used during interrupt and polled IO to wait for an event from 526 * the FAS chip. This function MUST NOT BE CALLED without interrupt disabled. 527 */ 528 void 529 sfasiwait(struct sfas_softc *dev) 530 { 531 sfas_regmap_p rp; 532 533 /* 534 * If SFAS_DONT_WAIT is set, we have already grabbed the interrupt info 535 * elsewhere. So we don't have to wait for it. 536 */ 537 if (dev->sc_flags & SFAS_DONT_WAIT) { 538 dev->sc_flags &= ~SFAS_DONT_WAIT; 539 return; 540 } 541 542 rp = dev->sc_fas; 543 544 /* Wait for FAS chip to signal an interrupt. */ 545 while(!(*rp->sfas_status & SFAS_STAT_INTERRUPT_PENDING)) 546 delay(1); 547 548 /* Grab interrupt info from chip. */ 549 dev->sc_status = *rp->sfas_status; 550 dev->sc_interrupt = *rp->sfas_interrupt; 551 if (dev->sc_interrupt & SFAS_INT_RESELECTED) { 552 dev->sc_resel[0] = *rp->sfas_fifo; 553 dev->sc_resel[1] = *rp->sfas_fifo; 554 } 555 } 556 557 /* 558 * Transfer info to/from device. sfas_ixfer uses polled IO+sfasiwait so the 559 * rules that apply to sfasiwait also applies here. 560 */ 561 void 562 sfas_ixfer(void *v, int polling) 563 { 564 struct sfas_softc *dev = v; 565 sfas_regmap_p rp; 566 u_char *buf; 567 int len, mode, phase; 568 569 rp = dev->sc_fas; 570 buf = dev->sc_buf; 571 len = dev->sc_len; 572 573 /* 574 * Decode the scsi phase to determine whether we are reading or writing. 575 * mode == 1 => READ, mode == 0 => WRITE 576 */ 577 phase = dev->sc_status & SFAS_STAT_PHASE_MASK; 578 mode = (phase == SFAS_PHASE_DATA_IN); 579 580 while(len && ((dev->sc_status & SFAS_STAT_PHASE_MASK) == phase)) 581 if (mode) { 582 *rp->sfas_command = SFAS_CMD_TRANSFER_INFO; 583 584 sfasiwait(dev); 585 586 *buf++ = *rp->sfas_fifo; 587 len--; 588 } else { 589 len--; 590 *rp->sfas_fifo = *buf++; 591 *rp->sfas_command = SFAS_CMD_TRANSFER_INFO; 592 593 sfasiwait(dev); 594 } 595 596 /* Update buffer pointers to reflect the sent/received data. */ 597 dev->sc_buf = buf; 598 dev->sc_len = len; 599 600 /* 601 * Since the last sfasiwait will be a phase-change, we can't wait for it 602 * again later, so we have to signal that. 603 * Since this may be called from an interrupt initiated routine then we 604 * must call sfasintr again to avoid losing an interrupt. Phew! 605 */ 606 if(polling) 607 dev->sc_flags |= SFAS_DONT_WAIT; 608 else 609 sfasintr(dev); 610 } 611 612 /* 613 * Build a Synchronous Data Transfer Request message 614 */ 615 void 616 sfas_build_sdtrm(struct sfas_softc *dev, int period, int offset) 617 { 618 dev->sc_msg_out[0] = 0x01; 619 dev->sc_msg_out[1] = 0x03; 620 dev->sc_msg_out[2] = 0x01; 621 dev->sc_msg_out[3] = period/4; 622 dev->sc_msg_out[4] = offset; 623 dev->sc_msg_out_len= 5; 624 } 625 626 /* 627 * Arbitate the scsi bus and select the unit 628 */ 629 int 630 sfas_select_unit(struct sfas_softc *dev, short target) 631 { 632 sfas_regmap_p rp; 633 struct nexus *nexus; 634 int s, retcode, i; 635 u_char cmd; 636 637 s = splbio(); /* Do this at splbio so that we won't be disturbed. */ 638 639 retcode = 0; 640 641 nexus = &dev->sc_nexus[target]; 642 643 /* 644 * Check if the chip is busy. If not the we mark it as so and hope that nobody 645 * reselects us until we have grabbed the bus. 646 */ 647 if (!(dev->sc_flags & SFAS_ACTIVE) && !dev->sc_sel_nexus) { 648 dev->sc_flags |= SFAS_ACTIVE; 649 650 rp = dev->sc_fas; 651 652 *rp->sfas_syncper = nexus->syncper; 653 *rp->sfas_syncoff = nexus->syncoff; 654 *rp->sfas_config3 = nexus->config3; 655 656 *rp->sfas_config1 = dev->sc_config1; 657 *rp->sfas_timeout = dev->sc_timeout_val; 658 *rp->sfas_dest_id = target; 659 660 /* If nobody has stolen the bus, we can send a select command to the chip. */ 661 if (!(*rp->sfas_status & SFAS_STAT_INTERRUPT_PENDING)) { 662 *rp->sfas_fifo = nexus->ID; 663 if ((nexus->flags & (SFAS_NF_DO_SDTR | SFAS_NF_RESET)) 664 || (dev->sc_msg_out_len != 0)) 665 cmd = SFAS_CMD_SEL_ATN_STOP; 666 else { 667 for(i=0; i<nexus->clen; i++) 668 *rp->sfas_fifo = nexus->cbuf[i]; 669 670 cmd = SFAS_CMD_SEL_ATN; 671 } 672 673 dev->sc_sel_nexus = nexus; 674 675 *rp->sfas_command = cmd; 676 retcode = 1; 677 nexus->flags &= ~SFAS_NF_RETRY_SELECT; 678 } else 679 nexus->flags |= SFAS_NF_RETRY_SELECT; 680 } else 681 nexus->flags |= SFAS_NF_RETRY_SELECT; 682 683 splx(s); 684 return(retcode); 685 } 686 687 /* 688 * Grab the nexus if available else return 0. 689 */ 690 struct nexus * 691 sfas_arbitate_target(struct sfas_softc *dev, int target) 692 { 693 struct nexus *nexus; 694 int s; 695 696 /* 697 * This is realy simple. Raise interrupt level to splbio. Grab the nexus and 698 * leave. 699 */ 700 nexus = &dev->sc_nexus[target]; 701 702 s = splbio(); 703 704 if (nexus->flags & SFAS_NF_UNIT_BUSY) 705 nexus = 0; 706 else 707 nexus->flags |= SFAS_NF_UNIT_BUSY; 708 709 splx(s); 710 return(nexus); 711 } 712 713 /* 714 * Setup a nexus for use. Initializes command, buffer pointers and DMA chain. 715 */ 716 void 717 sfas_setup_nexus(struct sfas_softc *dev, struct nexus *nexus, struct sfas_pending *pendp, unsigned char *cbuf, int clen, unsigned char *buf, int len, int mode) 718 { 719 char sync, target, lun; 720 721 target = pendp->xs->xs_periph->periph_target; 722 lun = pendp->xs->xs_periph->periph_lun; 723 724 /* 725 * Adopt mode to reflect the config flags. 726 * If we can't use DMA we can't use synch transfer. Also check the 727 * sfas_inhibit_xxx[target] flags. 728 */ 729 if ((dev->sc_config_flags & (SFAS_NO_SYNCH | SFAS_NO_DMA)) || 730 sfas_inhibit_sync[(int)target]) 731 mode &= ~SFAS_SELECT_S; 732 733 if ((dev->sc_config_flags & SFAS_NO_RESELECT) || 734 sfas_inhibit_disc[(int)target]) 735 mode &= ~SFAS_SELECT_R; 736 737 nexus->xs = pendp->xs; 738 739 /* Setup the nexus struct. */ 740 nexus->ID = ((mode & SFAS_SELECT_R) ? 0xC0 : 0x80) | lun; 741 nexus->clen = clen; 742 memcpy( nexus->cbuf, cbuf, nexus->clen); 743 nexus->cbuf[1] |= lun << 5; /* Fix the lun bits */ 744 nexus->cur_link = 0; 745 nexus->dma_len = 0; 746 nexus->dma_buf = 0; 747 nexus->dma_blk_len = 0; 748 nexus->dma_blk_ptr = 0; 749 nexus->len = len; 750 nexus->buf = buf; 751 nexus->lun_unit = (lun << 4) | target; 752 nexus->state = SFAS_NS_SELECTED; 753 754 /* We must keep these flags. All else must be zero. */ 755 nexus->flags &= SFAS_NF_UNIT_BUSY 756 | SFAS_NF_SYNC_TESTED | SFAS_NF_SELECT_ME; 757 758 if (mode & SFAS_SELECT_I) 759 nexus->flags |= SFAS_NF_IMMEDIATE; 760 if (mode & SFAS_SELECT_K) 761 nexus->flags |= SFAS_NF_RESET; 762 763 sync = ((mode & SFAS_SELECT_S) ? 1 : 0); 764 765 /* We can't use sync during polled IO. */ 766 if (sync && (mode & SFAS_SELECT_I)) 767 sync = 0; 768 769 if (!sync && 770 ((nexus->flags & SFAS_NF_SYNC_TESTED) && (nexus->offset != 0))) { 771 /* 772 * If the scsi unit is set to synch transfer and we don't want 773 * that, we have to renegotiate. 774 */ 775 776 nexus->flags |= SFAS_NF_DO_SDTR; 777 nexus->period = 200; 778 nexus->offset = 0; 779 } else if (sync && !(nexus->flags & SFAS_NF_SYNC_TESTED)) { 780 /* 781 * If the scsi unit is not set to synch transfer and we want 782 * that, we have to negotiate. This should realy base the 783 * period on the clock frequence rather than just check if 784 * >25 MHz 785 */ 786 787 nexus->flags |= SFAS_NF_DO_SDTR; 788 nexus->period = ((dev->sc_clock_freq>25) ? 100 : 200); 789 nexus->offset = 8; 790 791 /* If the user has a long cable, we want to limit the period */ 792 if ((nexus->period == 100) && 793 (dev->sc_config_flags & SFAS_SLOW_CABLE)) 794 nexus->period = 200; 795 } 796 797 /* 798 * Fake a DMA-block for polled IO. This way we can use the same code to handle 799 * reselection. Much nicer this way. 800 */ 801 if ((mode & SFAS_SELECT_I) || (dev->sc_config_flags & SFAS_NO_DMA)) { 802 nexus->dma[0].ptr = buf; 803 nexus->dma[0].len = len; 804 nexus->dma[0].flg = SFAS_CHAIN_PRG; 805 nexus->max_link = 1; 806 } else { 807 nexus->max_link = dev->sc_build_dma_chain(dev, nexus->dma, 808 buf, len); 809 } 810 811 /* Flush the caches. */ 812 813 if (len && !(mode & SFAS_SELECT_I)) 814 cpu_dcache_wbinv_range((vm_offset_t)buf, len); 815 } 816 817 int 818 sfasselect(struct sfas_softc *dev, struct sfas_pending *pendp, unsigned char *cbuf, int clen, unsigned char *buf, int len, int mode) 819 { 820 struct nexus *nexus; 821 822 /* Get the nexus struct. */ 823 nexus = sfas_arbitate_target(dev, pendp->xs->xs_periph->periph_target); 824 if (nexus == NULL) 825 return(0); 826 827 /* Setup the nexus struct. */ 828 sfas_setup_nexus(dev, nexus, pendp, cbuf, clen, buf, len, mode); 829 830 /* Post it to the interrupt machine. */ 831 sfas_select_unit(dev, pendp->xs->xs_periph->periph_target); 832 833 return(1); 834 } 835 836 void 837 sfasgo(struct sfas_softc *dev, struct sfas_pending *pendp) 838 { 839 int s; 840 char *buf; 841 842 buf = pendp->xs->data; 843 844 if (sfasselect(dev, pendp, (char *)pendp->xs->cmd, pendp->xs->cmdlen, 845 buf, pendp->xs->datalen, SFAS_SELECT_RS)) { 846 /* 847 * We got the command going so the sfas_pending struct is now 848 * free to reuse. 849 */ 850 851 s = splbio(); 852 TAILQ_INSERT_TAIL(&dev->sc_xs_free, pendp, link); 853 splx(s); 854 } else { 855 /* 856 * We couldn't make the command fly so we have to wait. The 857 * struct MUST be inserted at the head to keep the order of 858 * the commands. 859 */ 860 861 s = splbio(); 862 TAILQ_INSERT_HEAD(&dev->sc_xs_pending, pendp, link); 863 splx(s); 864 } 865 866 return; 867 } 868 869 /* 870 * Part one of the interrupt machine. Error checks and reselection test. 871 * We don't know if we have an active nexus here! 872 */ 873 int 874 sfas_pretests(struct sfas_softc *dev, sfas_regmap_p rp) 875 { 876 struct nexus *nexus; 877 int i, s; 878 879 if (dev->sc_interrupt & SFAS_INT_SCSI_RESET_DETECTED) { 880 /* 881 * Cleanup and notify user. Lets hope that this is all we 882 * have to do 883 */ 884 885 for(i=0; i<8; i++) { 886 if (dev->sc_nexus[i].xs) 887 sfas_scsidone(dev, dev->sc_nexus[i].xs, -2); 888 889 sfas_init_nexus(dev, &dev->sc_nexus[i]); 890 } 891 printf("sfasintr: SCSI-RESET detected!"); 892 return(-1); 893 } 894 895 if (dev->sc_interrupt & SFAS_INT_ILLEGAL_COMMAND) { 896 /* Something went terrible wrong! Dump some data and panic! */ 897 898 printf("FIFO:"); 899 while(*rp->sfas_fifo_flags & SFAS_FIFO_COUNT_MASK) 900 printf(" %x", *rp->sfas_fifo); 901 printf("\n"); 902 903 printf("CMD: %x\n", *rp->sfas_command); 904 panic("sfasintr: ILLEGAL COMMAND!"); 905 } 906 907 if (dev->sc_interrupt & SFAS_INT_RESELECTED) { 908 /* We were reselected. Set the chip as busy */ 909 910 s = splbio(); 911 dev->sc_flags |= SFAS_ACTIVE; 912 if (dev->sc_sel_nexus) { 913 dev->sc_sel_nexus->flags |= SFAS_NF_SELECT_ME; 914 dev->sc_sel_nexus = 0; 915 } 916 splx(s); 917 918 if (dev->sc_units_disconnected) { 919 /* Find out who reselected us. */ 920 921 dev->sc_resel[0] &= ~(1<<dev->sc_host_id); 922 923 for(i=0; i<8; i++) 924 if (dev->sc_resel[0] & (1<<i)) 925 break; 926 927 if (i == 8) 928 panic("Illegal reselection!"); 929 930 if (dev->sc_nexus[i].state == SFAS_NS_DISCONNECTED) { 931 /* 932 * This unit had disconnected, so we reconnect 933 * it. 934 */ 935 936 dev->sc_cur_nexus = &dev->sc_nexus[i]; 937 nexus = dev->sc_cur_nexus; 938 939 *rp->sfas_syncper = nexus->syncper; 940 *rp->sfas_syncoff = nexus->syncoff; 941 *rp->sfas_config3 = nexus->config3; 942 943 *rp->sfas_dest_id = i & 7; 944 945 dev->sc_units_disconnected--; 946 dev->sc_msg_in_len= 0; 947 948 /* Restore active pointers. */ 949 sfas_restore_pointers(dev); 950 951 nexus->state = SFAS_NS_RESELECTED; 952 953 *rp->sfas_command = SFAS_CMD_MESSAGE_ACCEPTED; 954 955 return(1); 956 } 957 } 958 959 /* Somehow we got an illegal reselection. Dump and panic. */ 960 printf("sfasintr: resel[0] %x resel[1] %x disconnected %d\n", 961 dev->sc_resel[0], dev->sc_resel[1], 962 dev->sc_units_disconnected); 963 panic("sfasintr: Unexpected reselection!"); 964 } 965 966 return(0); 967 } 968 969 /* 970 * Part two of the interrupt machine. Handle disconnection and post command 971 * processing. We know that we have an active nexus here. 972 */ 973 int 974 sfas_midaction(struct sfas_softc *dev, sfas_regmap_p rp, struct nexus *nexus) 975 { 976 int i, left, len, s; 977 u_char status, msg; 978 979 if (dev->sc_interrupt & SFAS_INT_DISCONNECT) { 980 s = splbio(); 981 dev->sc_cur_nexus = 0; 982 983 /* Mark chip as busy and clean up the chip FIFO. */ 984 dev->sc_flags &= ~SFAS_ACTIVE; 985 *rp->sfas_command = SFAS_CMD_FLUSH_FIFO; 986 987 /* Let the nexus state reflect what we have to do. */ 988 switch(nexus->state) { 989 case SFAS_NS_SELECTED: 990 dev->sc_sel_nexus = 0; 991 nexus->flags &= ~SFAS_NF_SELECT_ME; 992 993 /* 994 * We were trying to select the unit. Probably no unit 995 * at this ID. 996 */ 997 nexus->xs->resid = dev->sc_len; 998 999 nexus->status = -2; 1000 nexus->flags &= ~SFAS_NF_UNIT_BUSY; 1001 nexus->state = SFAS_NS_FINISHED; 1002 break; 1003 1004 case SFAS_NS_DONE: 1005 /* All done. */ 1006 nexus->xs->resid = dev->sc_len; 1007 1008 nexus->flags &= ~SFAS_NF_UNIT_BUSY; 1009 nexus->state = SFAS_NS_FINISHED; 1010 dev->sc_led(dev, 0); 1011 break; 1012 1013 case SFAS_NS_DISCONNECTING: 1014 /* 1015 * We have received a DISCONNECT message, so we are 1016 * doing a normal disconnection. 1017 */ 1018 nexus->state = SFAS_NS_DISCONNECTED; 1019 1020 dev->sc_units_disconnected++; 1021 break; 1022 1023 case SFAS_NS_RESET: 1024 /* 1025 * We were reseting this SCSI-unit. Clean up the 1026 * nexus struct. 1027 */ 1028 dev->sc_led(dev, 0); 1029 sfas_init_nexus(dev, nexus); 1030 break; 1031 1032 default: 1033 /* 1034 * Unexpected disconnection! Cleanup and exit. This 1035 * shouldn't cause any problems. 1036 */ 1037 printf("sfasintr: Unexpected disconnection\n"); 1038 printf("sfasintr: u %x s %d p %d f %x c %x\n", 1039 nexus->lun_unit, nexus->state, 1040 dev->sc_status & SFAS_STAT_PHASE_MASK, 1041 nexus->flags, nexus->cbuf[0]); 1042 1043 nexus->xs->resid = dev->sc_len; 1044 1045 nexus->flags &= ~SFAS_NF_UNIT_BUSY; 1046 nexus->state = SFAS_NS_FINISHED; 1047 nexus->status = -3; 1048 1049 dev->sc_led(dev, 0); 1050 break; 1051 } 1052 1053 /* 1054 * If we have disconnected units, we MUST enable reselection 1055 * within 250ms. 1056 */ 1057 if (dev->sc_units_disconnected && 1058 !(dev->sc_flags & SFAS_ACTIVE)) 1059 *rp->sfas_command = SFAS_CMD_ENABLE_RESEL; 1060 1061 splx(s); 1062 1063 /* Select the first pre-initialized nexus we find. */ 1064 for(i=0; i<8; i++) 1065 if (dev->sc_nexus[i].flags & (SFAS_NF_SELECT_ME | SFAS_NF_RETRY_SELECT)) 1066 if (sfas_select_unit(dev, i) == 2) 1067 break; 1068 1069 /* We are done with this nexus! */ 1070 if (nexus->state == SFAS_NS_FINISHED) 1071 sfas_scsidone(dev, nexus->xs, nexus->status); 1072 1073 return(1); 1074 } 1075 1076 switch(nexus->state) { 1077 case SFAS_NS_SELECTED: 1078 dev->sc_cur_nexus = nexus; 1079 dev->sc_sel_nexus = 0; 1080 1081 nexus->flags &= ~SFAS_NF_SELECT_ME; 1082 1083 /* 1084 * We have selected a unit. Setup chip, restore pointers and 1085 * light the led. 1086 */ 1087 *rp->sfas_syncper = nexus->syncper; 1088 *rp->sfas_syncoff = nexus->syncoff; 1089 *rp->sfas_config3 = nexus->config3; 1090 1091 sfas_restore_pointers(dev); 1092 1093 nexus->status = 0xFF; 1094 dev->sc_msg_in[0] = 0xFF; 1095 dev->sc_msg_in_len= 0; 1096 1097 dev->sc_led(dev, 1); 1098 1099 break; 1100 1101 case SFAS_NS_DATA_IN: 1102 case SFAS_NS_DATA_OUT: 1103 /* We have transfered data. */ 1104 if (dev->sc_dma_len) 1105 if (dev->sc_cur_link < dev->sc_max_link) { 1106 /* 1107 * Clean up DMA and at the same time get how 1108 * many bytes that were NOT transfered. 1109 */ 1110 left = dev->sc_setup_dma(dev, 0, 0, SFAS_DMA_CLEAR); 1111 len = dev->sc_dma_len; 1112 1113 if (nexus->state == SFAS_NS_DATA_IN) { 1114 /* 1115 * If we were bumping we may have had an odd length 1116 * which means that there may be bytes left in the 1117 * fifo. We also need to move the data from the 1118 * bump buffer to the actual memory. 1119 */ 1120 if (dev->sc_dma_buf == dev->sc_bump_pa) 1121 { 1122 while((*rp->sfas_fifo_flags&SFAS_FIFO_COUNT_MASK) 1123 && left) 1124 dev->sc_bump_va[len-(left--)] = *rp->sfas_fifo; 1125 1126 memcpy( dev->sc_buf, dev->sc_bump_va, len-left); 1127 } 1128 } else { 1129 /* Count any unsent bytes and flush them. */ 1130 left+= *rp->sfas_fifo_flags & SFAS_FIFO_COUNT_MASK; 1131 *rp->sfas_command = SFAS_CMD_FLUSH_FIFO; 1132 } 1133 1134 /* 1135 * Update pointers/length to reflect the transfered 1136 * data. 1137 */ 1138 dev->sc_len -= len-left; 1139 dev->sc_buf += len-left; 1140 1141 dev->sc_dma_buf = (char *)dev->sc_dma_buf + len-left; 1142 dev->sc_dma_len = left; 1143 1144 dev->sc_dma_blk_ptr = (char *)dev->sc_dma_blk_ptr + 1145 len-left; 1146 dev->sc_dma_blk_len -= len-left; 1147 1148 /* 1149 * If it was the end of a DMA block, we select the 1150 * next to begin with. 1151 */ 1152 if (!dev->sc_dma_blk_len) 1153 dev->sc_cur_link++; 1154 } 1155 break; 1156 1157 case SFAS_NS_STATUS: 1158 /* 1159 * If we were not sensing, grab the status byte. If we were 1160 * sensing and we got a bad status, let the user know. 1161 */ 1162 1163 status = *rp->sfas_fifo; 1164 msg = *rp->sfas_fifo; 1165 1166 nexus->status = status; 1167 if (status != 0) 1168 nexus->status = -1; 1169 1170 /* 1171 * Preload the command complete message. Handeled in 1172 * sfas_postaction. 1173 */ 1174 dev->sc_msg_in[0] = msg; 1175 dev->sc_msg_in_len = 1; 1176 nexus->flags |= SFAS_NF_HAS_MSG; 1177 break; 1178 1179 default: 1180 break; 1181 } 1182 1183 return(0); 1184 } 1185 1186 /* 1187 * Part three of the interrupt machine. Handle phase changes (and repeated 1188 * phase passes). We know that we have an active nexus here. 1189 */ 1190 int 1191 sfas_postaction(struct sfas_softc *dev, sfas_regmap_p rp, struct nexus *nexus) 1192 { 1193 int i, len; 1194 u_char cmd; 1195 short offset, period; 1196 1197 cmd = 0; 1198 1199 switch(dev->sc_status & SFAS_STAT_PHASE_MASK) { 1200 case SFAS_PHASE_DATA_OUT: 1201 case SFAS_PHASE_DATA_IN: 1202 if ((dev->sc_status & SFAS_STAT_PHASE_MASK) == 1203 SFAS_PHASE_DATA_OUT) 1204 nexus->state = SFAS_NS_DATA_OUT; 1205 else 1206 nexus->state = SFAS_NS_DATA_IN; 1207 1208 /* Make DMA ready to accept new data. Load active pointers 1209 * from the DMA block. */ 1210 dev->sc_setup_dma(dev, 0, 0, SFAS_DMA_CLEAR); 1211 if (dev->sc_cur_link < dev->sc_max_link) { 1212 if (!dev->sc_dma_blk_len) { 1213 dev->sc_dma_blk_ptr = dev->sc_chain[dev->sc_cur_link].ptr; 1214 dev->sc_dma_blk_len = dev->sc_chain[dev->sc_cur_link].len; 1215 dev->sc_dma_blk_flg = dev->sc_chain[dev->sc_cur_link].flg; 1216 } 1217 1218 /* We should use polled IO here. */ 1219 if (dev->sc_dma_blk_flg == SFAS_CHAIN_PRG) { 1220 dev->sc_ixfer(dev, nexus->xs->xs_control & XS_CTL_POLL); 1221 dev->sc_cur_link++; 1222 dev->sc_dma_len = 0; 1223 break; 1224 } 1225 else if (dev->sc_dma_blk_flg == SFAS_CHAIN_BUMP) 1226 len = dev->sc_dma_blk_len; 1227 else 1228 len = dev->sc_need_bump(dev, dev->sc_dma_blk_ptr, 1229 dev->sc_dma_blk_len); 1230 1231 /* 1232 * If len != 0 we must bump the data, else we just DMA it 1233 * straight into memory. 1234 */ 1235 if (len) { 1236 dev->sc_dma_buf = dev->sc_bump_pa; 1237 dev->sc_dma_len = len; 1238 1239 if (nexus->state == SFAS_NS_DATA_OUT) 1240 memcpy( dev->sc_bump_va, dev->sc_buf, dev->sc_dma_len); 1241 } else { 1242 dev->sc_dma_buf = dev->sc_dma_blk_ptr; 1243 dev->sc_dma_len = dev->sc_dma_blk_len; 1244 } 1245 1246 /* Load DMA with address and length of transfer. */ 1247 dev->sc_setup_dma(dev, dev->sc_dma_buf, dev->sc_dma_len, 1248 ((nexus->state == SFAS_NS_DATA_OUT) ? 1249 SFAS_DMA_WRITE : SFAS_DMA_READ)); 1250 1251 /* printf("Using DMA !!!!\n");*/ 1252 cmd = SFAS_CMD_TRANSFER_INFO | SFAS_CMD_DMA; 1253 } else { 1254 /* 1255 * Hmmm, the unit wants more info than we have or has 1256 * more than we want. Let the chip handle that. 1257 */ 1258 1259 *rp->sfas_tc_low = 0; /* was 256 but this does not make sense */ 1260 *rp->sfas_tc_mid = 1; 1261 *rp->sfas_tc_high = 0; 1262 cmd = SFAS_CMD_TRANSFER_PAD; 1263 } 1264 break; 1265 1266 case SFAS_PHASE_COMMAND: 1267 /* The scsi unit wants the command, send it. */ 1268 nexus->state = SFAS_NS_SVC; 1269 1270 *rp->sfas_command = SFAS_CMD_FLUSH_FIFO; 1271 for(i=0; i<5; i++); 1272 1273 for(i=0; i<nexus->clen; i++) 1274 *rp->sfas_fifo = nexus->cbuf[i]; 1275 cmd = SFAS_CMD_TRANSFER_INFO; 1276 break; 1277 1278 case SFAS_PHASE_STATUS: 1279 /* 1280 * We've got status phase. Request status and command 1281 * complete message. 1282 */ 1283 nexus->state = SFAS_NS_STATUS; 1284 cmd = SFAS_CMD_COMMAND_COMPLETE; 1285 break; 1286 1287 case SFAS_PHASE_MESSAGE_OUT: 1288 /* 1289 * Either the scsi unit wants us to send a message or we have 1290 * asked for it by seting the ATN bit. 1291 */ 1292 nexus->state = SFAS_NS_MSG_OUT; 1293 1294 *rp->sfas_command = SFAS_CMD_FLUSH_FIFO; 1295 1296 if (nexus->flags & SFAS_NF_DO_SDTR) { 1297 /* Send a Synchronous Data Transfer Request. */ 1298 1299 sfas_build_sdtrm(dev, nexus->period, nexus->offset); 1300 nexus->flags |= SFAS_NF_SDTR_SENT; 1301 nexus->flags &= ~SFAS_NF_DO_SDTR; 1302 } else if (nexus->flags & SFAS_NF_RESET) { 1303 /* Send a reset scsi unit message. */ 1304 1305 dev->sc_msg_out[0] = 0x0C; 1306 dev->sc_msg_out_len = 1; 1307 nexus->state = SFAS_NS_RESET; 1308 nexus->flags &= ~SFAS_NF_RESET; 1309 } else if (dev->sc_msg_out_len == 0) { 1310 /* Don't know what to send so we send a NOP message. */ 1311 1312 dev->sc_msg_out[0] = 0x08; 1313 dev->sc_msg_out_len = 1; 1314 } 1315 1316 cmd = SFAS_CMD_TRANSFER_INFO; 1317 1318 for(i=0; i<dev->sc_msg_out_len; i++) 1319 *rp->sfas_fifo = dev->sc_msg_out[i]; 1320 dev->sc_msg_out_len = 0; 1321 1322 break; 1323 1324 case SFAS_PHASE_MESSAGE_IN: 1325 /* Receive a message from the scsi unit. */ 1326 nexus->state = SFAS_NS_MSG_IN; 1327 1328 while(!(nexus->flags & SFAS_NF_HAS_MSG)) { 1329 *rp->sfas_command = SFAS_CMD_TRANSFER_INFO; 1330 sfasiwait(dev); 1331 1332 dev->sc_msg_in[dev->sc_msg_in_len++] = *rp->sfas_fifo; 1333 1334 /* Check if we got all the bytes in the message. */ 1335 if (dev->sc_msg_in[0] >= 0x80) ; 1336 else if (dev->sc_msg_in[0] >= 0x30) ; 1337 else if (((dev->sc_msg_in[0] >= 0x20) && 1338 (dev->sc_msg_in_len == 2)) || 1339 ((dev->sc_msg_in[0] != 0x01) && 1340 (dev->sc_msg_in_len == 1))) { 1341 nexus->flags |= SFAS_NF_HAS_MSG; 1342 break; 1343 } else { 1344 if (dev->sc_msg_in_len >= 2) 1345 if ((dev->sc_msg_in[1]+2) == dev->sc_msg_in_len) { 1346 nexus->flags |= SFAS_NF_HAS_MSG; 1347 break; 1348 } 1349 } 1350 1351 *rp->sfas_command = SFAS_CMD_MESSAGE_ACCEPTED; 1352 sfasiwait(dev); 1353 1354 if ((dev->sc_status & SFAS_STAT_PHASE_MASK) != 1355 SFAS_PHASE_MESSAGE_IN) 1356 break; 1357 } 1358 1359 cmd = SFAS_CMD_MESSAGE_ACCEPTED; 1360 if (nexus->flags & SFAS_NF_HAS_MSG) { 1361 /* We have a message. Decode it. */ 1362 1363 switch(dev->sc_msg_in[0]) { 1364 case 0x00: /* COMMAND COMPLETE */ 1365 nexus->state = SFAS_NS_DONE; 1366 break; 1367 case 0x04: /* DISCONNECT */ 1368 nexus->state = SFAS_NS_DISCONNECTING; 1369 break; 1370 case 0x02: /* SAVE DATA POINTER */ 1371 sfas_save_pointers(dev); 1372 break; 1373 case 0x03: /* RESTORE DATA POINTERS */ 1374 sfas_restore_pointers(dev); 1375 break; 1376 case 0x07: /* MESSAGE REJECT */ 1377 /* 1378 * If we had sent a SDTR and we got a message 1379 * reject, the scsi docs say that we must go 1380 * to async transfer. 1381 */ 1382 if (nexus->flags & SFAS_NF_SDTR_SENT) { 1383 nexus->flags &= ~SFAS_NF_SDTR_SENT; 1384 1385 nexus->config3 &= ~SFAS_CFG3_FASTSCSI; 1386 nexus->syncper = 5; 1387 nexus->syncoff = 0; 1388 1389 *rp->sfas_syncper = nexus->syncper; 1390 *rp->sfas_syncoff = nexus->syncoff; 1391 *rp->sfas_config3 = nexus->config3; 1392 } else 1393 /* 1394 * Something was rejected but we don't know 1395 * what! PANIC! 1396 */ 1397 panic("sfasintr: Unknown message rejected!"); 1398 break; 1399 case 0x08: /* MO OPERATION */ 1400 break; 1401 case 0x01: /* EXTENDED MESSAGE */ 1402 switch(dev->sc_msg_in[2]) { 1403 case 0x01:/* SYNC. DATA TRANSFER REQUEST */ 1404 /* Decode the SDTR message. */ 1405 period = 4*dev->sc_msg_in[3]; 1406 offset = dev->sc_msg_in[4]; 1407 1408 /* 1409 * Make sure that the specs are within 1410 * chip limits. Note that if we 1411 * initiated the negotiation the specs 1412 * WILL be withing chip limits. If it 1413 * was the scsi unit that initiated 1414 * the negotiation, the specs may be 1415 * to high. 1416 */ 1417 if (offset > 16) 1418 offset = 16; 1419 if ((period < 200) && 1420 (dev->sc_clock_freq <= 25)) 1421 period = 200; 1422 1423 if (offset == 0) 1424 period = 5*dev->sc_clock_period; 1425 1426 nexus->syncper = period/ 1427 dev->sc_clock_period; 1428 nexus->syncoff = offset; 1429 1430 if (period < 200) 1431 nexus->config3 |= SFAS_CFG3_FASTSCSI; 1432 else 1433 nexus->config3 &=~SFAS_CFG3_FASTSCSI; 1434 1435 nexus->flags |= SFAS_NF_SYNC_TESTED; 1436 1437 *rp->sfas_syncper = nexus->syncper; 1438 *rp->sfas_syncoff = nexus->syncoff; 1439 *rp->sfas_config3 = nexus->config3; 1440 1441 /* 1442 * Hmmm, it seems that the scsi unit 1443 * initiated sync negotiation, so lets 1444 * reply acording to scsi-2 standard. 1445 */ 1446 if (!(nexus->flags& SFAS_NF_SDTR_SENT)) 1447 { 1448 if ((dev->sc_config_flags & 1449 SFAS_NO_SYNCH) || 1450 (dev->sc_config_flags & 1451 SFAS_NO_DMA) || 1452 sfas_inhibit_sync[ 1453 nexus->lun_unit & 7]) { 1454 period = 200; 1455 offset = 0; 1456 } 1457 1458 nexus->offset = offset; 1459 nexus->period = period; 1460 nexus->flags |= SFAS_NF_DO_SDTR; 1461 *rp->sfas_command = SFAS_CMD_SET_ATN; 1462 } 1463 1464 nexus->flags &= ~SFAS_NF_SDTR_SENT; 1465 break; 1466 1467 case 0x00: /* MODIFY DATA POINTERS */ 1468 case 0x02: /* EXTENDED IDENTIFY (SCSI-1) */ 1469 case 0x03: /* WIDE DATA TRANSFER REQUEST */ 1470 default: 1471 /* Reject any unhandeled messages. */ 1472 1473 dev->sc_msg_out[0] = 0x07; 1474 dev->sc_msg_out_len = 1; 1475 *rp->sfas_command = SFAS_CMD_SET_ATN; 1476 cmd = SFAS_CMD_MESSAGE_ACCEPTED; 1477 break; 1478 } 1479 break; 1480 1481 default: 1482 /* Reject any unhandeled messages. */ 1483 1484 dev->sc_msg_out[0] = 0x07; 1485 dev->sc_msg_out_len = 1; 1486 *rp->sfas_command = SFAS_CMD_SET_ATN; 1487 cmd = SFAS_CMD_MESSAGE_ACCEPTED; 1488 break; 1489 } 1490 nexus->flags &= ~SFAS_NF_HAS_MSG; 1491 dev->sc_msg_in_len = 0; 1492 } 1493 break; 1494 default: 1495 printf("SFASINTR: UNKNOWN PHASE! phase: %d\n", 1496 dev->sc_status & SFAS_STAT_PHASE_MASK); 1497 dev->sc_led(dev, 0); 1498 sfas_scsidone(dev, nexus->xs, -4); 1499 1500 return(-1); 1501 } 1502 1503 if (cmd) 1504 *rp->sfas_command = cmd; 1505 1506 return(0); 1507 } 1508 1509 /* 1510 * Stub for interrupt machine. 1511 */ 1512 void 1513 sfasintr(struct sfas_softc *dev) 1514 { 1515 sfas_regmap_p rp; 1516 struct nexus *nexus; 1517 1518 rp = dev->sc_fas; 1519 1520 if (!sfas_pretests(dev, rp)) { 1521 1522 nexus = dev->sc_cur_nexus; 1523 if (nexus == NULL) 1524 nexus = dev->sc_sel_nexus; 1525 1526 if (nexus) 1527 if (!sfas_midaction(dev, rp, nexus)) 1528 sfas_postaction(dev, rp, nexus); 1529 } 1530 } 1531 1532 /* 1533 * sfasicmd is used to perform IO when we can't use interrupts. sfasicmd 1534 * emulates the normal environment by waiting for the chip and calling 1535 * sfasintr. 1536 */ 1537 void 1538 sfasicmd(struct sfas_softc *dev, struct sfas_pending *pendp) 1539 { 1540 sfas_regmap_p rp; 1541 struct nexus *nexus; 1542 1543 nexus = &dev->sc_nexus[pendp->xs->xs_periph->periph_target]; 1544 rp = dev->sc_fas; 1545 1546 if (!sfasselect(dev, pendp, (char *)pendp->xs->cmd, pendp->xs->cmdlen, 1547 (char *)pendp->xs->data, pendp->xs->datalen, 1548 SFAS_SELECT_I)) 1549 panic("sfasicmd: Couldn't select unit"); 1550 1551 while(nexus->state != SFAS_NS_FINISHED) { 1552 sfasiwait(dev); 1553 sfasintr(dev); 1554 } 1555 1556 nexus->flags &= ~SFAS_NF_SYNC_TESTED; 1557 } 1558 1559 1560 #ifdef SFAS_DEBUG 1561 1562 void 1563 dump_nexus(struct nexus *nexus) 1564 { 1565 int loop; 1566 1567 printf("nexus=%08x\n", (u_int)nexus); 1568 printf("scsi_fer=%08x\n", (u_int)nexus->xs); 1569 printf("ID=%02x\n", nexus->ID); 1570 printf("clen=%02x\n", nexus->clen); 1571 printf("cbuf="); 1572 for (loop = 0; loop< 14; ++loop) 1573 printf(" %02x\n", nexus->cbuf[loop]); 1574 printf("\n"); 1575 printf("DMA:\n"); 1576 for (loop = 0; loop < MAXCHAIN; ++loop) 1577 printf("dma_chain: %08x %04x %04x\n", nexus->dma[loop].ptr, 1578 nexus->dma[loop].len, nexus->dma[loop].flg); 1579 printf("\n"); 1580 1581 printf("max_link=%d\n", nexus->max_link); 1582 printf("cur_link=%d\n", nexus->cur_link); 1583 1584 printf("buf=%08x\n", (u_int)nexus->buf); 1585 printf("len=%08x\n", nexus->len); 1586 printf("dma_buf=%08x\n", (u_int)nexus->dma_buf); 1587 printf("dma_len=%08x\n", nexus->dma_len); 1588 printf("dma_blk_ptr=%08x\n", (u_int)nexus->dma_blk_ptr); 1589 printf("dma_blk_len=%08x\n", nexus->dma_blk_len); 1590 printf("dma_blk_flag=%08x\n", nexus->dma_blk_flg); 1591 printf("state=%02x\n", nexus->state); 1592 printf("flags=%04x\n", nexus->flags); 1593 printf("period=%d\n", nexus->period); 1594 printf("offset=%d\n", nexus->offset); 1595 printf("syncper=%d\n", nexus->syncper); 1596 printf("syncoff=%d\n", nexus->syncoff); 1597 printf("config3=%02x\n", nexus->config3); 1598 printf("lun_unit=%d\n", nexus->lun_unit); 1599 printf("status=%02x\n", nexus->status); 1600 printf("\n"); 1601 } 1602 1603 void 1604 dump_nexii(struct sfas_softc *sc) 1605 { 1606 int loop; 1607 1608 for (loop = 0; loop < 8; ++loop) { 1609 dump_nexus(&sc->sc_nexus[loop]); 1610 } 1611 } 1612 1613 void 1614 dump_sfassoftc(struct sfas_softc *sc) 1615 { 1616 printf("sfassoftc @ 0x%08x\n", (u_int)sc); 1617 printf("clock_freq = %d\n", sc->sc_clock_freq); 1618 printf("timeout = %d\n", sc->sc_timeout); 1619 printf("host_id = %d\n", sc->sc_host_id); 1620 printf("config_flags = 0x%08x\n", sc->sc_config_flags); 1621 printf("led_status = %d\n", sc->sc_led_status); 1622 1623 dump_nexii(sc); 1624 printf("cur_nexus = 0x%08x\n", (u_int)sc->sc_cur_nexus); 1625 printf("sel_nexus = 0x%08x\n", (u_int)sc->sc_sel_nexus); 1626 printf("\n"); 1627 } 1628 1629 #endif /* SFAS_DEBUG */ 1630
Indexes created Thu Oct 16 14:10:15 GMT 2025